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Man that tq spike is gnarly for a vf48. That has got to be a blast. To bad the hp isnt a little closer to the tq but in my opinion the tq is where all the fun is. Nice build tho Im at 300hp 325 tq on my stage 2 sti and would give my left but to have 380 tq.

FYI, as a forester guy, i have been in other modified FXT's with 4EAT trans, pushing similiar torque. Yes the auto trans does something strange and puts the power down at the low end, there is no BS there folks. Dont be so quick to judge. You always see splits like this among the builds of forester XT's, Baja XT's, Outback XT's , Legacy GTs (5eat) and the occasional rare 4EAT wrx, only made up until 05. Plus its 2.5 bottom end.

Yeah. I don't buy it at all. Torque converters are KNOWN to artificially inflate dyno torque numbers.

Look how fast it dips. That's the converter. The torque doesn't magically go away like that.

Once the turbine, impeller and stator reach the same speed, multiplication stops and torque drops.

The only accurate dyno for an auto is with a locked converter. And I'm willing to bet a considerable amount the OP didn't have his locked.

Who cares how the torque is made? It is, and thats all that matters. Really any car isn't 'accurate' to the engine hp and torque due to drivetrain loss on a chassis dyno. But guess what its more realistic than measuring on an engine dyno, because you are seeing what the wheels are recieving, not what the engine puts out.

I'm curious, was this pull done in 2nd or 3rd? Numbers seem high-ish for a 93 pump auto car on a mustang dyno.

Anyways, very nice car to the OP. Enjoy it! I love the auto myself, its much better than any 5 speed

Who cares how the torque is made? It is, and thats all that matters. Really any car isn't 'accurate' to the engine hp and torque due to drivetrain loss on a chassis dyno. But guess what its more realistic than measuring on an engine dyno, because you are seeing what the wheels are recieving, not what the engine puts out.

How's it artifically inflated? You're measuring what's at the wheels. It's not the engine making all that torque, but there is torque multiplication through the TC which is brought at the wheels. Hence 390wtq, not 390 ctq.

Noone said that this engine paired to a manual gearbox would make these numbers, it would probably make more peak hp, less peak tq. Now your way of thinking, does this mean these horsepower / top end torque numbers artifically low due to the higher parsitic loss of a hydraulic automatic?

Edit: I kind of see where you can come from. Using like a road dyno software this becomes evident. If you are measuring how quick it can accelerate RPMs, then yes, this 'slip' is shows up as torque rise/then dip. However, I am very sure it measures torque simply by how quick it can accelerate the rollers and then assigns RPM datapoints to it afterwards, hence this is real torque. You could always measure it torque vs. time and see what happens.

How's it artifically inflated? You're measuring what's at the wheels. It's not the engine making all that torque, but there is torque multiplication through the TC which is brought at the wheels. Hence 390wtq, not 390 ctq.

Noone said that this engine paired to a manual gearbox would make these numbers, it would probably make more peak hp, less peak tq. Now your way of thinking, does this mean these horsepower / top end torque numbers artifically low due to the higher parsitic loss of a hydraulic automatic?

Edit: I kind of see where you can come from. Using like a road dyno software this becomes evident. If you are measuring how quick it can accelerate RPMs, then yes, this 'slip' is shows up as torque rise/then dip. However, I am very sure it measures torque simply by how quick it can accelerate the rollers and then assigns RPM datapoints to it afterwards, hence this is real torque. You could always measure it torque vs. time and see what happens.

So tell me what happens when you brake stall on the dyno.
What happens when you lock the converter?
What happens when you change your final drive ratio? Does gearing effect power output?

Why don't manual guys slip the clutch like they do a "launch" to raise measured torque on the dyno? Because it skews numbers? Nah, no way. It's cause they don't know how to get artificial numbers like a stall gives you.

So tell me what happens when you brake stall on the dyno. Never done it, not sure what it would do.
What happens when you lock the converter? Torque Muliplication goes away
What happens when you change your final drive ratio? Does gearing effect power output? Yes.

So tell me what happens when you brake stall on the dyno. Never done it, not sure what it would do.
What happens when you lock the converter? Torque Muliplication goes away
What happens when you change your final drive ratio? Does gearing effect power output? Yes.

Seems like you haven't done a lot of things.

Why don't manual guys slip the clutch on dynos?

How does a dyno calculate torque? Does it use rpm? What happens if the Rpms are not directly connected to the drivetrain rotation?

The Torque curve, as plotted against engine RPM, is not accurate in the sense that the engine is not actually at the RPM indicated on the chart but I wouldn't go as far as "artificially inflating..." That RPM scale is calculated from the roller speed. As soon as you step on the gas, the engine will speed up to the stall speed and the wheels has to "catch up". The calculated RPM will be less than the actual engine speed.

That being said, the torque curve, as shown, does give an indication of the acceleration that you would feel. Imagine if you were blindfolded and didn't know the car had an automatic, would it feel like a lot of "low end" torque?